High-power uplink and downlink switching device, and communication apparatus

Abstract

a high-power uplink and downlink switching device and a communication apparatus are disclosed. A radio frequency switch and a synchronization control module of the device cooperate. A circulator has a first port connected to an output end of a power amplification module, a second port connected to a second radio frequency port, and a third port connected to a low-noise amplifier module via a first radio frequency switch. The third port is further connected to a high-power load resistor and a second radio frequency switch via a first microstrip line, so as to be separately grounded. A radio frequency impedance from a first end to a second end of the first microstrip line is in a high-impedance state.

1 . A high-power uplink and downlink switching device, comprising:
 a radio frequency switch, a common end of which is used to connect to a first radio frequency port;   a power amplifier module, an input end of which is connected to a downlink end of the radio frequency switch;   a circulator, a first port of which is connected to an output end of the power amplifier module, and a second port of which is used to connect to a second radio frequency port;   a first radio frequency switch, a first end of which is connected to a third port of the circulator;   a low noise amplifier module, an input end of which is connected to a second end of the first radio frequency switch, and an output end of which is connected to an uplink end of the radio frequency switch;   a first microstrip line, a first end of which is connected to the third port of the circulator, wherein the radio frequency impedance from the first end to a second end of the first microstrip line is in a high impedance state;   a load resistor, a first end of which is connected to the second end of the first microstrip line, and the second end of which is grounded;   a second radio frequency switch, a first end of which is connected to the second end of the first microstrip line, and a second end of which is grounded; and   a synchronization control module, an input end of which is used to connect to the first radio frequency port, and an output end of which is respectively connected to a control end of the radio frequency switch, a control end of the first radio frequency switch and a control end of the second radio frequency switch.   
     
     
         2 . The high-power uplink and downlink switching device as recited in  claim 1 , wherein the output end of the synchronization control module is connected to a control end of the power amplifier module and a control end of the low noise amplifier module respectively. 
     
     
         3 . The high-power uplink and downlink switching device as recited in  claim 2 , wherein:
 the synchronization control module includes a synchronization unit and a level inverter;   an input end of the synchronization unit is used to connect to the first radio frequency port, and an output end of the synchronization unit is respectively connected to an input end of the level inverter, the control end of the radio frequency switch, the control end of the power amplifier module, and the control end of the second radio frequency switch;   an output end of the level inverter is respectively connected to the control end of the low noise amplifier module and the control end of the first radio frequency switch.   
     
     
         4 . The high-power uplink and downlink switching device as recited in  claim 1 , further comprising a coupler connected between the first radio frequency port and the synchronization control module; an input end of the coupler is used to connect to the first radio frequency port, and a coupling end thereof is connected to the input end of the synchronization control module. 
     
     
         5 . The high-power uplink and downlink switching device as recited in  claim 1 , further comprising a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, and a seventh microstrip line;
 the downlink end of the radio frequency switch is connected to the input end of the power amplifier module through the second microstrip line;   the output end of the power amplifier module is connected to the first port of the circulator through the third micro strip line;   the second port of the circulator is connected to the second radio frequency port through the fourth micro strip line;   the third port of the circulator is respectively connected to the first end of the first radio frequency switch and the first end of the first micro strip line through the fifth micro strip line;   the second end of the first radio frequency switch is connected to the input end of the low noise amplifier module through the sixth microstrip line;   the output end of the low noise amplifier module is connected to the uplink end of the radio frequency switch through the seventh microstrip line.   
     
     
         6 . The high-power uplink and downlink switching device as recited in  claim 5 , wherein the electrical lengths of the second microstrip line, the third microstrip line, the fourth microstrip line, the fifth microstrip line, the sixth microstrip line, and the seventh microstrip line are all in a range of 10 degrees to 180 degrees. 
     
     
         7 . The high-power uplink and downlink switching device as recited in  claim 5 , wherein the characteristic impedances of the second microstrip line, the third microstrip line, the fourth microstrip line, the fifth microstrip line, the sixth microstrip line, and the seventh microstrip line are all in a range of 48 ohms to 52 ohms. 
     
     
         8 . The high-power uplink and downlink switching device according to  claim 1 , wherein the characteristic impedance of the first microstrip line ranges from 50 ohms to 100 ohms. 
     
     
         9 . The high-power uplink and downlink switching device according to  claim 1 , wherein the electrical length of the first microstrip line ranges from 85 degrees to 95 degrees. 
     
     
         10 . A communication apparatus comprising the high-power uplink and downlink switching device according to  claim 1 . 
     
     
         11 . The communication apparatus
 as recited in  claim 10 , wherein the output end of the synchronization control module is connected to a control end of the power amplifier module and a control end of the low noise amplifier module respectively.   
     
     
         12 . The communication apparatus as recited in  claim 11 , wherein:
 the synchronization control module includes a synchronization unit and a level inverter;   an input end of the synchronization unit is used to connect to the first radio frequency port, and an output end of the synchronization unit is respectively connected to an input end of the level inverter, the control end of the radio frequency switch, the control end of the power amplifier module, and the control end of the second radio frequency switch;   an output end of the level inverter is respectively connected to the control end of the low noise amplifier module and the control end of the first radio frequency switch.   
     
     
         13 . The communication apparatus as recited in  claim 10 , further comprising a coupler connected between the first radio frequency port and the synchronization control module; an input end of the coupler is used to connect to the first radio frequency port, and a coupling end thereof is connected to the input end of the synchronization control module. 
     
     
         14 . The communication apparatus as recited in  claim 10 , further comprising a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, and a seventh microstrip line;
 the downlink end of the radio frequency switch is connected to the input end of the power amplifier module through the second microstrip line;   the output end of the power amplifier module is connected to the first port of the circulator through the third microstrip line;   the second port of the circulator is connected to the second radio frequency port through the fourth microstrip line;   the third port of the circulator is respectively connected to the first end of the first radio frequency switch and the first end of the first microstrip line through the fifth microstrip line;   the second end of the first radio frequency switch is connected to the input end of the low noise amplifier module through the sixth microstrip line;   the output end of the low noise amplifier module is connected to the uplink end of the radio frequency switch through the seventh microstrip line.   
     
     
         15 . The communication apparatus as recited in  claim 14 , wherein the electrical lengths of the second microstrip line, the third microstrip line, the fourth microstrip line, the fifth microstrip line, the sixth microstrip line, and the seventh microstrip line are all in a range of 10 degrees to 180 degrees. 
     
     
         16 . The communication apparatus as recited in  claim 14 , wherein the characteristic impedances of the second microstrip line, the third microstrip line, the fourth microstrip line, the fifth microstrip line, the sixth microstrip line, and the seventh microstrip line are all in a range of 48 ohms to 52 ohms. 
     
     
         17 . The communication apparatus as recited in  claim 10 , wherein the characteristic impedance of the first microstrip line ranges from 50 ohms to 100 ohms. 
     
     
         18 . The communication apparatus as recited in  claim 10 , wherein the electrical length of the first microstrip line ranges from 85 degrees to 95 degrees.